wp_notify_postauthor

函式


      wp_notify_postauthor ( $comment_id, $deprecated = null )

引數

(int|WP_Comment) $comment_id Comment ID or WP_Comment object.

Required: 是
(string) $deprecated Not used.

Required: 否

Default: null

返回值

(bool) True on completion. False if no email addresses were specified.

定義位置

wp-includes/pluggable.php , line 1620

相關方法: wp_new_comment_notify_postauthor wp_notify_moderator wp_list_authors wp_is_post_autosave wp_get_post_autosave

引入: 1.0.0

棄用: -

wp_notify_postauthor: 當有新的評論發表時，這個函式會向文章的作者傳送電子郵件通知。它包括關於評論的資訊和一個文章的連結。

通知作者（和/或其他人）關於一個文章的評論/轉發/回帖。

function wp_notify_postauthor( $comment_id, $deprecated = null ) {

if ( null !== $deprecated ) {

_deprecated_argument( __FUNCTION__, '3.8.0' );

}

$comment = get_comment( $comment_id );

if ( empty( $comment ) || empty( $comment->comment_post_ID ) ) {

return false;

}

$post = get_post( $comment->comment_post_ID );

$author = get_userdata( $post->post_author );

// Who to notify? By default, just the post author, but others can be added.

$emails = array();

if ( $author ) {

$emails[] = $author->user_email;

}

/**

* Filters the list of email addresses to receive a comment notification.

* By default, only post authors are notified of comments. This filter allows

* others to be added.

* @since 3.7.0

* @param string[] $emails An array of email addresses to receive a comment notification.

* @param string $comment_id The comment ID as a numeric string.

$emails = apply_filters( 'comment_notification_recipients', $emails, $comment->comment_ID );

$emails = array_filter( $emails );

// If there are no addresses to send the comment to, bail.

if ( ! count( $emails ) ) {

return false;

}

// Facilitate unsetting below without knowing the keys.

$emails = array_flip( $emails );

/**

* Filters whether to notify comment authors of their comments on their own posts.

* By default, comment authors aren't notified of their comments on their own

* posts. This filter allows you to override that.

* @since 3.8.0

* @param bool $notify Whether to notify the post author of their own comment.

* Default false.

* @param string $comment_id The comment ID as a numeric string.

$notify_author = apply_filters( 'comment_notification_notify_author', false, $comment->comment_ID );

// The comment was left by the author.

if ( $author && ! $notify_author && $comment->user_id == $post->post_author ) {

unset( $emails[ $author->user_email ] );

}

// The author moderated a comment on their own post.

if ( $author && ! $notify_author && get_current_user_id() == $post->post_author ) {

unset( $emails[ $author->user_email ] );

}

// The post author is no longer a member of the blog.

if ( $author && ! $notify_author && ! user_can( $post->post_author, 'read_post', $post->ID ) ) {

unset( $emails[ $author->user_email ] );

}

// If there's no email to send the comment to, bail, otherwise flip array back around for use below.

if ( ! count( $emails ) ) {

return false;

} else {

$emails = array_flip( $emails );

}

$switched_locale = switch_to_locale( get_locale() );

$comment_author_domain = '';

if ( WP_Http::is_ip_address( $comment->comment_author_IP ) ) {

$comment_author_domain = gethostbyaddr( $comment->comment_author_IP );

}

// The blogname option is escaped with esc_html() on the way into the database in sanitize_option().

// We want to reverse this for the plain text arena of emails.

$blogname = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );

$comment_content = wp_specialchars_decode( $comment->comment_content );

switch ( $comment->comment_type ) {

case 'trackback':

/* translators: %s: Post title. */

$notify_message = sprintf( __( 'New trackback on your post "%s"' ), $post->post_title ) . "rn";

/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */

$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "rn";

/* translators: %s: Trackback/pingback/comment author URL. */

$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "rn";

/* translators: %s: Comment text. */

$notify_message .= sprintf( __( 'Comment: %s' ), "rn" . $comment_content ) . "rnrn";

$notify_message .= __( 'You can see all trackbacks on this post here:' ) . "rn";

/* translators: Trackback notification email subject. 1: Site title, 2: Post title. */

$subject = sprintf( __( '[%1$s] Trackback: "%2$s"' ), $blogname, $post->post_title );

break;

case 'pingback':

/* translators: %s: Post title. */

$notify_message = sprintf( __( 'New pingback on your post "%s"' ), $post->post_title ) . "rn";

/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */

$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "rn";

/* translators: %s: Trackback/pingback/comment author URL. */

$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "rn";

/* translators: %s: Comment text. */

$notify_message .= sprintf( __( 'Comment: %s' ), "rn" . $comment_content ) . "rnrn";

$notify_message .= __( 'You can see all pingbacks on this post here:' ) . "rn";

/* translators: Pingback notification email subject. 1: Site title, 2: Post title. */

$subject = sprintf( __( '[%1$s] Pingback: "%2$s"' ), $blogname, $post->post_title );

break;

default: // Comments.

/* translators: %s: Post title. */

$notify_message = sprintf( __( 'New comment on your post "%s"' ), $post->post_title ) . "rn";

/* translators: 1: Comment author's name, 2: Comment author's IP address, 3: Comment author's hostname. */

$notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "rn";

/* translators: %s: Comment author email. */

$notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "rn";

/* translators: %s: Trackback/pingback/comment author URL. */

$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "rn";

if ( $comment->comment_parent && user_can( $post->post_author, 'edit_comment', $comment->comment_parent ) ) {

/* translators: Comment moderation. %s: Parent comment edit URL. */

$notify_message .= sprintf( __( 'In reply to: %s' ), admin_url( "comment.php?action=editcomment&c={$comment->comment_parent}#wpbody-content" ) ) . "rn";

}

/* translators: %s: Comment text. */

$notify_message .= sprintf( __( 'Comment: %s' ), "rn" . $comment_content ) . "rnrn";

$notify_message .= __( 'You can see all comments on this post here:' ) . "rn";

/* translators: Comment notification email subject. 1: Site title, 2: Post title. */

$subject = sprintf( __( '[%1$s] Comment: "%2$s"' ), $blogname, $post->post_title );

break;

}

$notify_message .= get_permalink( $comment->comment_post_ID ) . "#commentsrnrn";

/* translators: %s: Comment URL. */

$notify_message .= sprintf( __( 'Permalink: %s' ), get_comment_link( $comment ) ) . "rn";

if ( user_can( $post->post_author, 'edit_comment', $comment->comment_ID ) ) {

if ( EMPTY_TRASH_DAYS ) {

/* translators: Comment moderation. %s: Comment action URL. */

$notify_message .= sprintf( __( 'Trash it: %s' ), admin_url( "comment.php?action=trash&c={$comment->comment_ID}#wpbody-content" ) ) . "rn";

} else {

/* translators: Comment moderation. %s: Comment action URL. */

$notify_message .= sprintf( __( 'Delete it: %s' ), admin_url( "comment.php?action=delete&c={$comment->comment_ID}#wpbody-content" ) ) . "rn";

}

/* translators: Comment moderation. %s: Comment action URL. */

$notify_message .= sprintf( __( 'Spam it: %s' ), admin_url( "comment.php?action=spam&c={$comment->comment_ID}#wpbody-content" ) ) . "rn";

}

$wp_email = 'wordpress@' . preg_replace( '#^www.#', '', wp_parse_url( network_home_url(), PHP_URL_HOST ) );

if ( '' === $comment->comment_author ) {

$from = "From: "$blogname" <$wp_email>";

if ( '' !== $comment->comment_author_email ) {

$reply_to = "Reply-To: $comment->comment_author_email";

}

} else {

$from = "From: "$comment->comment_author" <$wp_email>";

if ( '' !== $comment->comment_author_email ) {

$reply_to = "Reply-To: "$comment->comment_author_email" <$comment->comment_author_email>";

}

$message_headers = "$fromn"

. 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . ""n";

if ( isset( $reply_to ) ) {

$message_headers .= $reply_to . "n";

}

/**

* Filters the comment notification email text.

* @since 1.5.2

* @param string $notify_message The comment notification email text.

* @param string $comment_id Comment ID as a numeric string.

$notify_message = apply_filters( 'comment_notification_text', $notify_message, $comment->comment_ID );

/**

* Filters the comment notification email subject.

* @since 1.5.2

* @param string $subject The comment notification email subject.

* @param string $comment_id Comment ID as a numeric string.

$subject = apply_filters( 'comment_notification_subject', $subject, $comment->comment_ID );

/**

* Filters the comment notification email headers.

* @since 1.5.2

* @param string $message_headers Headers for the comment notification email.

* @param string $comment_id Comment ID as a numeric string.

$message_headers = apply_filters( 'comment_notification_headers', $message_headers, $comment->comment_ID );

foreach ( $emails as $email ) {

wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );

}

if ( $switched_locale ) {

restore_previous_locale();

}

return true;

}

endif;

if ( ! function_exists( 'wp_notify_moderator' ) ) :

/**

* Notifies the moderator of the site about a new comment that is awaiting approval.

* @since 1.0.0

* @global wpdb $wpdb WordPress database abstraction object.

* Uses the {@see 'notify_moderator'} filter to determine whether the site moderator

* should be notified, overriding the site setting.

* @param int $comment_id Comment ID.

* @return true Always returns true.

function wp_notify_postauthor( $comment_id, $deprecated = null ) {
		if ( null !== $deprecated ) {
			_deprecated_argument( __FUNCTION__, '3.8.0' );
		}

		$comment = get_comment( $comment_id );
		if ( empty( $comment ) || empty( $comment->comment_post_ID ) ) {
			return false;
		}

		$post   = get_post( $comment->comment_post_ID );
		$author = get_userdata( $post->post_author );

		// Who to notify? By default, just the post author, but others can be added.
		$emails = array();
		if ( $author ) {
			$emails[] = $author->user_email;
		}

		/**
		 * Filters the list of email addresses to receive a comment notification.
		 *
		 * By default, only post authors are notified of comments. This filter allows
		 * others to be added.
		 *
		 * @since 3.7.0
		 *
		 * @param string[] $emails     An array of email addresses to receive a comment notification.
		 * @param string   $comment_id The comment ID as a numeric string.
		 */
		$emails = apply_filters( 'comment_notification_recipients', $emails, $comment->comment_ID );
		$emails = array_filter( $emails );

		// If there are no addresses to send the comment to, bail.
		if ( ! count( $emails ) ) {
			return false;
		}

		// Facilitate unsetting below without knowing the keys.
		$emails = array_flip( $emails );

		/**
		 * Filters whether to notify comment authors of their comments on their own posts.
		 *
		 * By default, comment authors aren't notified of their comments on their own
		 * posts. This filter allows you to override that.
		 *
		 * @since 3.8.0
		 *
		 * @param bool   $notify     Whether to notify the post author of their own comment.
		 *                           Default false.
		 * @param string $comment_id The comment ID as a numeric string.
		 */
		$notify_author = apply_filters( 'comment_notification_notify_author', false, $comment->comment_ID );

		// The comment was left by the author.
		if ( $author && ! $notify_author && $comment->user_id == $post->post_author ) {
			unset( $emails[ $author->user_email ] );
		}

		// The author moderated a comment on their own post.
		if ( $author && ! $notify_author && get_current_user_id() == $post->post_author ) {
			unset( $emails[ $author->user_email ] );
		}

		// The post author is no longer a member of the blog.
		if ( $author && ! $notify_author && ! user_can( $post->post_author, 'read_post', $post->ID ) ) {
			unset( $emails[ $author->user_email ] );
		}

		// If there's no email to send the comment to, bail, otherwise flip array back around for use below.
		if ( ! count( $emails ) ) {
			return false;
		} else {
			$emails = array_flip( $emails );
		}

		$switched_locale = switch_to_locale( get_locale() );

		$comment_author_domain = '';
		if ( WP_Http::is_ip_address( $comment->comment_author_IP ) ) {
			$comment_author_domain = gethostbyaddr( $comment->comment_author_IP );
		}

		// The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
		// We want to reverse this for the plain text arena of emails.
		$blogname        = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
		$comment_content = wp_specialchars_decode( $comment->comment_content );

		switch ( $comment->comment_type ) {
			case 'trackback':
				/* translators: %s: Post title. */
				$notify_message = sprintf( __( 'New trackback on your post "%s"' ), $post->post_title ) . "rn";
				/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
				$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "rn";
				/* translators: %s: Trackback/pingback/comment author URL. */
				$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "rn";
				/* translators: %s: Comment text. */
				$notify_message .= sprintf( __( 'Comment: %s' ), "rn" . $comment_content ) . "rnrn";
				$notify_message .= __( 'You can see all trackbacks on this post here:' ) . "rn";
				/* translators: Trackback notification email subject. 1: Site title, 2: Post title. */
				$subject = sprintf( __( '[%1$s] Trackback: "%2$s"' ), $blogname, $post->post_title );
				break;

			case 'pingback':
				/* translators: %s: Post title. */
				$notify_message = sprintf( __( 'New pingback on your post "%s"' ), $post->post_title ) . "rn";
				/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
				$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "rn";
				/* translators: %s: Trackback/pingback/comment author URL. */
				$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "rn";
				/* translators: %s: Comment text. */
				$notify_message .= sprintf( __( 'Comment: %s' ), "rn" . $comment_content ) . "rnrn";
				$notify_message .= __( 'You can see all pingbacks on this post here:' ) . "rn";
				/* translators: Pingback notification email subject. 1: Site title, 2: Post title. */
				$subject = sprintf( __( '[%1$s] Pingback: "%2$s"' ), $blogname, $post->post_title );
				break;

			default: // Comments.
				/* translators: %s: Post title. */
				$notify_message = sprintf( __( 'New comment on your post "%s"' ), $post->post_title ) . "rn";
				/* translators: 1: Comment author's name, 2: Comment author's IP address, 3: Comment author's hostname. */
				$notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "rn";
				/* translators: %s: Comment author email. */
				$notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "rn";
				/* translators: %s: Trackback/pingback/comment author URL. */
				$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "rn";

				if ( $comment->comment_parent && user_can( $post->post_author, 'edit_comment', $comment->comment_parent ) ) {
					/* translators: Comment moderation. %s: Parent comment edit URL. */
					$notify_message .= sprintf( __( 'In reply to: %s' ), admin_url( "comment.php?action=editcomment&c={$comment->comment_parent}#wpbody-content" ) ) . "rn";
				}

				/* translators: %s: Comment text. */
				$notify_message .= sprintf( __( 'Comment: %s' ), "rn" . $comment_content ) . "rnrn";
				$notify_message .= __( 'You can see all comments on this post here:' ) . "rn";
				/* translators: Comment notification email subject. 1: Site title, 2: Post title. */
				$subject = sprintf( __( '[%1$s] Comment: "%2$s"' ), $blogname, $post->post_title );
				break;
		}

		$notify_message .= get_permalink( $comment->comment_post_ID ) . "#commentsrnrn";
		/* translators: %s: Comment URL. */
		$notify_message .= sprintf( __( 'Permalink: %s' ), get_comment_link( $comment ) ) . "rn";

		if ( user_can( $post->post_author, 'edit_comment', $comment->comment_ID ) ) {
			if ( EMPTY_TRASH_DAYS ) {
				/* translators: Comment moderation. %s: Comment action URL. */
				$notify_message .= sprintf( __( 'Trash it: %s' ), admin_url( "comment.php?action=trash&c={$comment->comment_ID}#wpbody-content" ) ) . "rn";
			} else {
				/* translators: Comment moderation. %s: Comment action URL. */
				$notify_message .= sprintf( __( 'Delete it: %s' ), admin_url( "comment.php?action=delete&c={$comment->comment_ID}#wpbody-content" ) ) . "rn";
			}
			/* translators: Comment moderation. %s: Comment action URL. */
			$notify_message .= sprintf( __( 'Spam it: %s' ), admin_url( "comment.php?action=spam&c={$comment->comment_ID}#wpbody-content" ) ) . "rn";
		}

		$wp_email = 'wordpress@' . preg_replace( '#^www.#', '', wp_parse_url( network_home_url(), PHP_URL_HOST ) );

		if ( '' === $comment->comment_author ) {
			$from = "From: "$blogname" <$wp_email>";
			if ( '' !== $comment->comment_author_email ) {
				$reply_to = "Reply-To: $comment->comment_author_email";
			}
		} else {
			$from = "From: "$comment->comment_author" <$wp_email>";
			if ( '' !== $comment->comment_author_email ) {
				$reply_to = "Reply-To: "$comment->comment_author_email" <$comment->comment_author_email>";
			}
		}

		$message_headers = "$fromn"
		. 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . ""n";

		if ( isset( $reply_to ) ) {
			$message_headers .= $reply_to . "n";
		}

		/**
		 * Filters the comment notification email text.
		 *
		 * @since 1.5.2
		 *
		 * @param string $notify_message The comment notification email text.
		 * @param string $comment_id     Comment ID as a numeric string.
		 */
		$notify_message = apply_filters( 'comment_notification_text', $notify_message, $comment->comment_ID );

		/**
		 * Filters the comment notification email subject.
		 *
		 * @since 1.5.2
		 *
		 * @param string $subject    The comment notification email subject.
		 * @param string $comment_id Comment ID as a numeric string.
		 */
		$subject = apply_filters( 'comment_notification_subject', $subject, $comment->comment_ID );

		/**
		 * Filters the comment notification email headers.
		 *
		 * @since 1.5.2
		 *
		 * @param string $message_headers Headers for the comment notification email.
		 * @param string $comment_id      Comment ID as a numeric string.
		 */
		$message_headers = apply_filters( 'comment_notification_headers', $message_headers, $comment->comment_ID );

		foreach ( $emails as $email ) {
			wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );
		}

		if ( $switched_locale ) {
			restore_previous_locale();
		}

		return true;
	}
endif;

if ( ! function_exists( 'wp_notify_moderator' ) ) :
	/**
	 * Notifies the moderator of the site about a new comment that is awaiting approval.
	 *
	 * @since 1.0.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * Uses the {@see 'notify_moderator'} filter to determine whether the site moderator
	 * should be notified, overriding the site setting.
	 *
	 * @param int $comment_id Comment ID.
	 * @return true Always returns true.
	 */

常見問題

FAQs

如何使用get_users獲取所有使用者列表？
要使用` get_users `函式獲取所有使用者列表，可以按照以下步驟進行：

1. 使用` get_users `函式呼叫獲取使用者列表：

Plain text
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Open code in new window
EnlighterJS 3 Syntax Highlighter
$users = get_users();
$users = get_users();
```
$users = get_users();
```
2. 您可以按需使用引數來過濾結果。例如，您可以通過角色、使用者ID、使用者登入名等過濾使用者列表。以下是一個根據使用者角色為過濾條件的示例：

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EnlighterJS 3 Syntax Highlighter
$users = get_users( array(
'role' => 'subscriber' // 將角色名稱替換為您要過濾的角色
) );
$users = get_users( array( 'role' => 'subscriber' // 將角色名稱替換為您要過濾的角色 ) );
```
$users = get_users( array(
    'role' => 'subscriber' // 將角色名稱替換為您要過濾的角色
) );
```
在上述示例中，將` role `引數設定為所需的角色名稱來過濾使用者列表。

3. 您可以使用迴圈遍歷獲取的使用者列表，並訪問每個使用者的屬性。例如，以下示例將顯示每個使用者的使用者名稱和電子郵件地址：

Plain text
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EnlighterJS 3 Syntax Highlighter
foreach( $users as $user ) {
echo '使用者名稱：' . $user->user_login . ', 電子郵件：' . $user->user_email . ;
}
foreach( $users as $user ) { echo '使用者名稱：' . $user->user_login . ', 電子郵件：' . $user->user_email . ; }
```
foreach( $users as $user ) {
    echo '使用者名稱：' . $user->user_login . ', 電子郵件：' . $user->user_email . ;
}
```
在上述示例中，通過` $user->user_login `和` $user->user_email `訪問每個使用者的使用者名稱和電子郵件地址。

請注意，` get_users `函式預設返回所有使用者，並可以根據需要使用更多引數進行過濾。您可以參閱WordPress官方文件中的` get_users `函式文件，瞭解更多可用引數和用法示例。

總結起來，使用` get_users `函式獲取所有使用者列表的步驟是：
1. 呼叫` get_users `函式獲取使用者列表。
2. 使用可選的過濾引數，根據需要過濾使用者列表。
3. 使用迴圈遍歷使用者列表，並訪問每個使用者的屬性。
如何使用WP_PLUGIN_DIR和WP_PLUGIN_URL定義外掛的目錄和URL？
在WordPress中，可以使用WP_PLUGIN_DIR和WP_PLUGIN_URL常量來定義外掛的目錄路徑和URL。

1. `WP_PLUGIN_DIR`：這是一個常量，用於定義外掛的目錄路徑（檔案系統路徑）。您可以使用以下程式碼在外掛檔案中訪問該常量：

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$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/';
$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/';
```
$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/';
```
在上述程式碼中，將"your-plugin-folder"替換為您外掛的實際資料夾名稱。使用該常量，您可以獲取外掛檔案的完整路徑。

2. `WP_PLUGIN_URL`：這是一個常量，用於定義外掛的URL（用於在網頁上訪問外掛檔案）。以下是一個使用該常量的示例：

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$plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
$plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
```
$plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
```
同樣，請將"your-plugin-folder"替換為您外掛的實際資料夾名稱。使用該常量，您可以獲取外掛在網頁上的完整URL。

請注意，`WP_PLUGIN_DIR`和`WP_PLUGIN_URL`常量在WordPress版本2.6之後引入。從WordPress 5.5版本開始，這兩個常量被標記為過時（deprecated），因為WordPress更傾向於使用新的外掛檔案結構。如果您正在開發新外掛，建議使用新的外掛檔案結構和相關函式。

在新的外掛檔案結構中，可以使用以下函式來獲取外掛的目錄路徑和URL：

- `plugin_dir_path()`：獲取外掛目錄路徑。
- `plugin_dir_url()`：獲取外掛URL。

這些函式會自動將外掛的版本、多站點和SSL等考慮因素納入計算。

總結起來，使用`WP_PLUGIN_DIR`和`WP_PLUGIN_URL`常量定義外掛的目錄和URL的方法是：

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$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/';
$plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/'; $plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
```
$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/';
$plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
```
但請注意，這兩個常量已被標記為過時，建議使用新的外掛檔案結構和相關函式來獲取外掛的路徑和URL。
如何使用PHP在WordPress中新增自定義功能？
使用PHP在WordPress中新增自定義功能可以通過以下方式實現：
- 建立一個自定義外掛，將功能程式碼新增到外掛中。
- 使用WordPress的鉤子系統，將自定義功能繫結到適當的鉤子上。
- 在主題檔案中新增自定義功能程式碼，例如functions.php檔案。
- 使用WordPress的短程式碼功能，將自定義功能封裝為短程式碼。
- 使用WordPress的外掛或主題編輯器，將自定義功能程式碼新增到適當的位置。
下面是一個實操示例。

要在WordPress中新增自定義功能，可以按照以下步驟使用PHP編寫並新增自定義功能：
1. 開啟WordPress安裝目錄中的主題資料夾，通常位於wp-content/themes/下，找到正在使用的主題資料夾。
2. 在主題資料夾中，可以建立一個名為functions.php的檔案。如果該檔案已經存在，可以直接編輯它。
3. 在functions.php檔案中，可以使用PHP程式碼新增自定義功能。以下是一些常見的示例：
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  // 新增自定義功能示例
  // 1. 建立自定義短程式碼
  function custom_shortcode() {
  return '這是我的自定義短程式碼內容';
  }
  add_shortcode('custom', 'custom_shortcode');
  // 2. 自定義小工具
  function custom_widget() {
  echo '這是我的自定義小工具內容';
  }
  register_widget('custom_widget');
  // 3. 自定義選單
  function custom_menu() {
  register_nav_menu('custom-menu', '自定義選單');
  }
  add_action('after_setup_theme', 'custom_menu');
  // 4. 自定義頁面模板
  function custom_page_template() {
  /* Template Name: 自定義模板 */
  // 自定義模板的內容和樣式
  }
  // 新增自定義功能示例 // 1. 建立自定義短程式碼 function custom_shortcode() { return '這是我的自定義短程式碼內容'; } add_shortcode('custom', 'custom_shortcode'); // 2. 自定義小工具 function custom_widget() { echo '這是我的自定義小工具內容'; } register_widget('custom_widget'); // 3. 自定義選單 function custom_menu() { register_nav_menu('custom-menu', '自定義選單'); } add_action('after_setup_theme', 'custom_menu'); // 4. 自定義頁面模板 function custom_page_template() { /* Template Name: 自定義模板 */ // 自定義模板的內容和樣式 }
```
// 新增自定義功能示例

// 1. 建立自定義短程式碼
function custom_shortcode() {
    return '這是我的自定義短程式碼內容';
}
add_shortcode('custom', 'custom_shortcode');

// 2. 自定義小工具
function custom_widget() {
    echo '這是我的自定義小工具內容';
}
register_widget('custom_widget');

// 3. 自定義選單
function custom_menu() {
    register_nav_menu('custom-menu', '自定義選單');
}
add_action('after_setup_theme', 'custom_menu');

// 4. 自定義頁面模板
function custom_page_template() {
    /* Template Name: 自定義模板 */
    // 自定義模板的內容和樣式
}
```
4. 編輯完functions.php檔案後，儲存並上傳到WordPress主題資料夾中。
請注意，修改主題檔案可以在主題更新時丟失，因此建議在進行任何更改之前備份functions.php檔案。此外，為避免不必要的錯誤和衝突，建議在新增自定義功能前先了解WordPress開發文件和最佳實踐，以確保正確、安全地實現所需的自定義功能。
如何進行WordPress資料庫查詢優化？
進行WordPress資料庫查詢優化可以通過以下方式實現：
- 使用WordPress提供的內建查詢函式，例如 WP_Query 、 get_posts 等。
- 使用適當的查詢引數和過濾器，減少查詢次數和資料量。
- 編寫自定義的資料庫查詢語句，使用適當的索引和快取。
- 優化資料庫伺服器配置和效能。
- 定期清理和優化資料庫表。
如何使用do_action來觸發一個鉤子函式？
使用 do_action 函式可以觸發一個鉤子函式。do_action 函式的引數與要觸發的鉤子函式的引數相同。

例如，觸發save_post鉤子函式的程式碼如下：

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do_action( 'save_post', $post_ID, $post );
do_action( 'save_post', $post_ID, $post );
```
do_action( 'save_post', $post_ID, $post );
```
這裡，$post_ID 和 $post 是傳遞給鉤子函式的引數。
如何使用wp_get_current_user獲取當前登入使用者的資訊？
使用 wp_get_current_user 獲取當前登入使用者的資訊：

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$current_user = wp_get_current_user();

// 獲取當前使用者的ID
$user_id = $current_user->ID;

// 獲取當前使用者的使用者名稱
$user_login = $current_user->user_login;

// 獲取當前使用者的郵箱
$user_email = $current_user->user_email;

// 獲取當前使用者的顯示名稱
$display_name = $current_user->display_name;
$current_user = wp_get_current_user(); // 獲取當前使用者的ID $user_id = $current_user->ID; // 獲取當前使用者的使用者名稱 $user_login = $current_user->user_login; // 獲取當前使用者的郵箱 $user_email = $current_user->user_email; // 獲取當前使用者的顯示名稱 $display_name = $current_user->display_name;
```
$current_user = wp_get_current_user();  
  
// 獲取當前使用者的ID  
$user_id = $current_user->ID;  
  
// 獲取當前使用者的使用者名稱  
$user_login = $current_user->user_login;  
  
// 獲取當前使用者的郵箱  
$user_email = $current_user->user_email;  
  
// 獲取當前使用者的顯示名稱  
$display_name = $current_user->display_name;
```

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